CSS: 常用滚动条

子元素滚动条到底部再滚动，不影响父元素的滚动条

使用了overscroll-behavior: contain;

overscroll-behavior: contain;

控制滚动条

window下的scrollTo事件，scrollTo自带滚动效果

        let btn = document.getElementsByClassName('scrollBtn');
     
        function scrollBtn() {
            let scrollOptions = {
                left: 0,
                top: 1000,
                behavior: "smooth"
            }
            window.scrollTo(scrollOptions);
        }